DX-Patrol Converter for OSCAR-100

Especifications:

• TX output frequency 2400 MHz

• TX input Frequency 434MHz

• LO Input Es´hail-2 satellite OSCAR-100 >>2400Mhz<<: +10dBm- 1966Mhz ( 434MHz)

• TX RF input: ( 100mW to 5W max) 434 MHz

• TX RF output: 20dBm (100mW)

• Power supply: 10-16V

• Connectors: SMA

• PCB dimension : 80mm/ 65mm

• Voltage : 10V to 16V

• Power consumption 300mA

Fig 1 Circuit diagram

fig 2 PCB assembled and tested

Fig 3Typical Saw filter cut diagram.

Fig4 TX RF spectrum ( spurious emissions better than 30dB below)

This is a complete TX only module linear converter for 2400MHz (13cm band.)

Covers the SSB/CW/FM and Satellite segments of 13cm band

Local Oscillator.

Using a Ultra Low Jitter ABLJO from Abracon Crystal Oscillator.

• High "Q", 3rd Overtone Crystal Technology • Ultra Low Jitter performance 0.10 ps Max. (12kHz to 20MHz) • Standard LVCMOS RF Output • Wide Operating Temperature (-40ºC to +85ºC) standard • ±40 ppm Max. All inclusive Stability (including Aging) over 10-years

The Frequency is multiplied several times and amplified to 7dBm level.

Fig 5 Local Oscillator signal over a 50Mhz to 2Ghz span.

The Converter TX power is 100mW, enough power to drive a Wi-Fi booster amplifier for 4W or 8W versionsYou cab order one of this amps cheap on ebay or amazon.This amps have a internal VOX-TX really fast switching. No PTT required.8W is sufficient for Uplink the satellite. Very clean and linear output.

Due the power losses on 2.4Ghz, we recommend you to use a very good waterproof box, the closestto the antenna as possible, and fit the converter and booster inside.The signal will be transported on IF, 434MHz, with a good low-loss coaxial cable.Depending on the length and loss of cable, you can adjust the TX gain on the tx gain R9.

TR1 freq. Adjust It´s where you can adjust the Local oscillator frequency. You can correct with a good frequency meter or by listening you CW by the feedback over the satellite on 10.490Ghz

Enjoy this great fun geostationary satellite Qatar OSCAR 100.

Best 73Tony ct1ffu

mail sales@dxpatrol.pt tel +351965626669 Obidos – Portugal